<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
			<el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
			<el-breadcrumb-item>商品管理</el-breadcrumb-item>
			<el-breadcrumb-item>商品分类</el-breadcrumb-item>
		</el-breadcrumb>
		<!-- 卡片 -->
		<el-card>
			<!-- 添加按钮 -->
			<el-row :gutter="20">		
				<el-col :span="4">
					<el-button type="primary" icon="el-icon-search" @click="showAddCateDialog">添加分类</el-button>
				</el-col>
			</el-row>
			<!-- 表格区域 -->
			<tree-table class="treetable" :data="cateList" :columns="columns" :selection-type="false" :expand-type="false"
			show-index index-text="#" border>
				<template slot="isok" slot-scope="scope">
					<i class="el-icon-success" v-if="scope.row.cat_deleted == false" style="color: lightgreen;"></i>
					<i class="el-icon-error" v-else style="color: red;"></i>
				</template>
				<!-- 排序 -->
				<template slot="order" slot-scope="scope">
					<el-tag size="mini" v-if="scope.row.cat_level == 0">一级</el-tag>
					<el-tag type="success" size="mini" v-else-if="scope.row.cat_level == 1">二级</el-tag>
					<el-tag type="warning" size="mini" v-else>三级</el-tag>
				</template>
				<!-- 操作 -->
				<template slot="opt" slot-scope="scope">
					<el-button type="primary" size="mini" icon="el-icon-edit">编辑</el-button>
					<el-button type="danger" size="mini" icon="el-icon-delete" @click="delectList(scope.row)">删除</el-button>
				</template>
			</tree-table>
			<!-- 分页 -->
			<el-pagination
			      @size-change="handleSizeChange"
			      @current-change="handleCurrentChange"
			      :current-page="queryInfo.pagenum"
			      :page-sizes="[5, 10, 15, 20]"
			      :page-size="queryInfo.pagesize"
			      layout="total, sizes, prev, pager, next, jumper"
			      :total="this.total">
			</el-pagination>
		</el-card>
		<!-- 添加分类对话框 -->
		<el-dialog
		  title="添加分类"
		  :visible.sync="catedialogVisible"
		  width="50%"
		  @close="addCateDialogClosed">
		  <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
		    <el-form-item label="分类名称：" prop="cat_name">
		      <el-input v-model="addCateForm.cat_name"></el-input>
		    </el-form-item>
		    <el-form-item label="父级分类：">
		      <!-- options 用来指定数据源 -->
		      <!-- props 用来指定配置对象 -->
		     <el-cascader			    
				 v-model="selectedKeys"
		         :options="parentCateList"
		         :props="casccaderProps"
		         @change="parentCatechange"
				 clearable >				 
			</el-cascader>
		    </el-form-item>
		  </el-form>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="catedialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="addCate">确 定</el-button>
		  </span>
		</el-dialog>

	</div>
</template>

<script>
	export default {
		data() {
			return {
				queryInfo:{
					type:3,
					pagenum:1,
					pagesize:5
				},
				cateList:[],
				total:0,
				// 为table制定列的定义
				columns:[
					{ label: '分类名称',prop:'cat_name'},
					{ label: '是否有效',
					  type: 'template',
					  template: 'isok'
					},
					{ label: '排序',
					  type: 'template',
					  template: 'order'
					},
					{ label: '操作',
					  type: 'template',
					  template: 'opt'
					}
				],
				catedialogVisible: false,
				addCateForm: {
				  // 将要添加的分类的名称
				  cat_name: '',
				  // 父级分类的Id
				  cat_pid: 0,
				  // 分类的等级，默认要添加的是1级分类
				  cat_level: 0
				},
				// 添加分类表单的验证规则对象
				addCateFormRules: {
				  cat_name: [
				    { required: true, message: '请输入分类名称', trigger: 'blur' }
				  ]
				},
				parentCateList: [],
				casccaderProps: {
					value: 'cat_id',
					label:'cat_name',
					children:'children',
					expandTrigger:'hover',
					checkStrictly: true
					
				},
				selectedKeys: []
			}
		},
		created() {
			this.getCatelist()
		},
		methods: {
			async getCatelist() {
				const {data: res} = await this.$http.get('categories',{ params: this.queryInfo})
				if(res.meta.status!=200) return 
				this.cateList = res.data.result
				this.total = res.data.total
				
			},
			// 监听页码改变
			handleSizeChange (newSize){
				this.queryInfo.pagesize = newSize
				this.getCatelist()
			},
			//监听pagenum的改变
			handleCurrentChange (newpage){
				this.queryInfo.pagenum = newpage
				this.getCatelist()
			},
			showAddCateDialog(){
				this.getParentCateList()
				this.catedialogVisible = true
			},
			addCateDialogClosed (){
				this.$refs.addCateFormRef.resetFields()
				this.selectedKeys = []
				this.addCateForm.cat_pid = 0
				this.addCateForm.cat_level = 0
			},
			async getParentCateList() {
				const {data: res} = await this.$http.get('categories',{params:{type:2}})
				if(res.meta.status != 200) return
				 this.parentCateList = res.data
			},
			parentCatechange() {
				
				if(this.selectedKeys.length>0){
					this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length-1]
					this.addCateForm.cat_level = this.selectedKeys.length
				}else {
					this.addCateForm.cat_pid = 0
					this.addCateForm.cat_level = 0
				}
			},
			addCate() {
				this.$refs.addCateFormRef.validate(async valid => {
				  if (!valid) return
				  const { data: res } = await this.$http.post(
				    'categories',
				    this.addCateForm
				  )
				
				  if (res.meta.status !== 201) {
				    return this.$message.error('添加分类失败！')
				  }
				
				  this.$message.success('添加分类成功！')
				  this.getCatelist()
				  this.catedialogVisible = false
				})
			},
			async delectList(scope){
				const {data: res} = await this.$http.delete('categories/' + scope.cat_id )
				if (res.meta.status !== 200) {
				  return this.$message.error('删除失败！')
				}
								
				this.$message.success('删除成功！')
				this.getCatelist()				
			}
		}
	}
</script>

<style lang="less" scoped>
	.treetable{
		margin-top: 15px;
	}
	.el-cascader{
		width: 100%;
	}
</style>
